package edu.nwpu.utils;

import com.auth0.jwt.JWT;
import com.auth0.jwt.JWTVerifier;
import com.auth0.jwt.algorithms.Algorithm;
import com.auth0.jwt.interfaces.DecodedJWT;

import java.util.Date;
import java.util.HashMap;
import java.util.Map;


public abstract class TokenUtil {
    //设置过期时间
    private static final long EXPIRE_DATE = 30 * 60 * 100000;
    //token秘钥
    private static final String TOKEN_SECRET = "ZCEQIUBFKSJBFJH2020BQWE";

    public static String getToken(String name, String pwd) {
        String token = "";
        try {
            Date date = new Date(System.currentTimeMillis() + EXPIRE_DATE);
            Algorithm algorithm = Algorithm.HMAC256(TOKEN_SECRET);
            Map<String, Object> header = new HashMap<>();
            header.put("typ", "JWT");
            header.put("alg", "HS256");
            token = JWT.create().withHeader(header)
                    .withClaim("name", name)
                    .withClaim("pwd", pwd)
                    .withExpiresAt(date).sign(algorithm);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return token;
    }

    public static boolean verify(String token) {
        try {
            Algorithm algorithm = Algorithm.HMAC256(TOKEN_SECRET);
            JWTVerifier verifier = JWT.require(algorithm).build();
            DecodedJWT jwt = verifier.verify(token);
            return true;
        } catch (Exception e) {
            System.err.println(e.getLocalizedMessage());
        }
        return false;
    }
}
